#include<iostream>
using namespace std;

int main() {
    int a = 3;
    int &b = a;
    int &c = a;
    int *d = &a;
    int *p = &a;

    cout << "b address = " << &b << ",c'address = " << &c << endl;
    cout << "d address = " << d << ",p'address = " << p << endl;
    return 0;
}
